Beginner Question PV planning

[evgeniy.labunskiy (Yevhenii Labunskyi)]

You cannot use Multiplus without batteries. It may end up with very bad results. Here are some references

Can I connect Victron Multiplus II 8000 to grid as first connection without battery?

Wait for your battery to arrive, the multiplus is neither supported nor designed to work without a battery. You will just be stressing the input relays to try power it without a DC source.

Ac switch turns off when L1 returns in three phase system

Why are you powering a system without a battery? This is unsupported, the system is not designed to be operated like that and you risk damaging the input relays.